<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
          <dl>
            <dt>
              <span class="c-999 fsize14">课程类别</span>
            </dt>
            <!--一级分类-->
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li>
                  <a title="全部" href="javascript:void(0);" @click="searchOne('')">全部</a>
                </li>
                <li v-for="(oneSubject,index) in oneSubjectList" :key="index" :class="{active:oneIndex===index}">
                  <a :title="oneSubject.title" href="javascript:void(0);" @click="searchOne(oneSubject.id,index)">{{oneSubject.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <!--二级分类-->
          <dl>
            <dt>
              <span class="c-999 fsize14"></span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li v-for="(twoSubject,index) in twoSubjectList" :key="index" :class="{active:twoIndex==index}">
                  <a :title="twoSubject.title" href="javascript:void(0);" @click="searchTwo(twoSubject.id,index)">{{twoSubject.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <div class="clear"></div>
        </section>
        <!--排序方式-->
        <div class="js-wrap">
          <section class="fr">
            <span class="c-ccc">
              <i class="c-master f-fM">{{data.current}}</i>/
              <i class="c-666 f-fM">{{data.pages}}</i>
            </span>
          </section>
          <section class="fl">
            <ol class="js-tap clearfix">
              <li :class="{'current bg-orange':buyCountSort!==''}">
                <a title="销量" href="javascript:void(0);" @click="searchBuyCount()">销量
                  <span :class="{hide:buyCountSort===''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange':createTimeSort!==''}">
                <a title="最新" href="javascript:void(0);" @click="searchCreateTime()">最新
                  <span :class="{hide:createTimeSort===''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange':priceSort!==''}">
                <a title="价格" href="javascript:void(0);" @click="searchPrice()">价格&nbsp;
                  <span :class="{hide:priceSort===''}">↓</span>
                </a>
              </li>
            </ol>
          </section>
        </div>
        <div class="mt40">
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total === 0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
          </section>
          <!-- /无数据提示 结束-->
          <article class="comm-course-list">
            <ul class="of" id="bna">
              <li v-for="course in data.items" :key="course.id">
                <div class="cc-l-wrap">
                  <section class="course-img">
                    <img :src="course.cover" style="width: 250px;height: 250px;" class="img-responsive"
                         :alt="course.title">
                    <div class="cc-mask">
                      <a :href="'/course/'+course.id" title="开始学习" class="comm-btn c-btn-1">开始学习</a>
                    </div>
                  </section>
                  <h3 class="hLh30 txtOf mt10">
                    <a :href="'/course/'+course.id" :title="course.title" class="course-title fsize18 c-333">{{course.title}}</a>
                  </h3>
                  <section class="mt10 hLh20 of">
                    <span class="fr jgTag bg-green" v-if="Number(course.price) === 0">
                      <i class="c-fff fsize12 f-fA">免费</i>
                    </span>
                    <span class="fl jgAttr c-ccc f-fA">
                      <i class="c-999 f-fA">{{course.viewCount}}人学习</i>
                      |
                      <i class="c-999 f-fA">{{course.commentCount}}评论</i>
                    </span>
                  </section>
                </div>
              </li>
            </ul>
            <div class="clear"></div>
          </article>
        </div>
        <!--分页-->
        <div>
          <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="首页"
              @click.prevent="gotoPage(1)">首</a>
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="前一页"
              @click.prevent="gotoPage(data.current-1)">&lt;</a>
            <a
              v-for="page in data.pages"
              :key="page"
              :class="{current: data.current == page, undisable: data.current == page}"
              :title="'第'+page+'页'"
              href="#"
              @click.prevent="gotoPage(page)">{{ page }}</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="后一页"
              @click.prevent="gotoPage(data.current+1)">&gt;</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="末页"
              @click.prevent="gotoPage(data.pages)">末</a>
            <div class="clear"/>
          </div>
        </div>
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>
<script>
  import course from "@/api/course";
  import cookie from 'js-cookie'

  export default {
    data() {
      return {
        loginInfo: {},
        data: {},//课程列表
        current: 1,//当前页
        limit: 8,//每页显示记录数
        searchObj: {courseName: ''},//查询对象
        oneSubjectList: [],//一级分类列表
        twoSubjectList: [],//二级分类列表
        oneIndex: -1,//一级分类索引
        twoIndex: -1,//二级分类索引
        buyCountSort: '',//销量排序
        createTimeSort: '',//最新排序
        priceSort: '',//价格排序
      }
    },
    created() {
      //初始化课程
      this.initCourse()
      //初始化一级分类
      this.getOneSubject()
    },
    methods: {
      //初始化课程数据
      initCourse() {
        course.pageCourseList(this.current, this.limit, this.searchObj)
          .then(response => {
            this.data = response.data.data
          })
      },
      //获取所有一级分类
      getOneSubject() {
        course.querySubjectList()
          .then(response => {
            this.oneSubjectList = response.data.data.subjectVoList
          })
      },
      //分页
      gotoPage(current) {
        this.page = current
        course.pageCourseList(current, 8, this.searchObj)
          .then(response => {
            this.data = response.data.data
          })
      },
      //点击一级分类，显示二级分类
      searchOne(subjectParentId, index) {
        //设置一级分类索引
        this.oneIndex = index
        this.twoIndex = -1//设置二级分类索引
        //清空查询条件
        this.searchObj.subjectId = ''
        this.twoSubjectList = []
        //设置一级分类id
        this.searchObj.subjectParentId = subjectParentId
        //调用分页方法
        this.gotoPage(this.current)
        //遍历一级分类获取二级分类
        for (let i = 0; i < this.oneSubjectList.length; i++) {
          //判断所有一级分类id和二级分类的一级分类id是否相同
          if (this.oneSubjectList[i].id === subjectParentId) {
            //获取二级分类
            this.twoSubjectList = this.oneSubjectList[i].children
          }
        }
      },
      //点击二级分类，查询对应课程
      searchTwo(subjectId, index) {
        this.twoIndex = index//设置索引
        //设置二级分类id
        this.searchObj.subjectId = subjectId
        //调用分页方法
        this.gotoPage(this.current)
      },
      //销量排序
      searchBuyCount() {
        //向点击的属性里面设置值--随便设置，只要有值就行
        this.buyCountSort = '1'
        this.createTimeSort = ''
        this.priceSort = ''
        //向查询对象中设置值
        this.searchObj.buyCountSort = this.buyCountSort
        this.searchObj.createTimeSort = this.createTimeSort
        this.searchObj.priceSort = this.priceSort
        //调用分页查询方法
        this.gotoPage(this.current)
      },
      //最新排序
      searchCreateTime() {
        //向点击的属性里面设置值--随便设置，只要有值就行
        this.buyCountSort = ''
        this.createTimeSort = '1'
        this.priceSort = ''
        //向查询对象中设置值
        this.searchObj.buyCountSort = this.buyCountSort
        this.searchObj.createTimeSort = this.createTimeSort
        this.searchObj.priceSort = this.priceSort
        //调用分页查询方法
        this.gotoPage(this.current)
      },
      //价格排序
      searchPrice() {
        //向点击的属性里面设置值--随便设置，只要有值就行
        this.buyCountSort = ''
        this.createTimeSort = ''
        this.priceSort = '1'
        //向查询对象中设置值
        this.searchObj.buyCountSort = this.buyCountSort
        this.searchObj.createTimeSort = this.createTimeSort
        this.searchObj.priceSort = this.priceSort
        //调用分页查询方法
        this.gotoPage(this.current)
      }
    }
  };
</script>
<style scoped>
  .active {
    background: #bdbdbd;
  }

  .hide {
    display: none;
  }

  .show {
    display: block;
  }
</style>
